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Symbiotic Nitrogen Fixation in the Fungus Gardens of Leaf-Cutter Ants

by Chu, Fiona S.T , Currie, Cameron R , Cleland, W. Wallace , Suen, Garret , Pinto-Tomás, Adrián A , Weimer, Paul J , Anderson, Mark A , Stevenson, David M

in Acetylene - metabolism / Acetylene reduction / Animal and plant ecology / Animal, plant and microbial ecology / Animals / ant colonies / Ants / Ants - metabolism / Ants - microbiology / Ants - physiology / Argentina / Autoecology / Bacteria / Biological and medical sciences / biomass / Costa Rica / Ecosystem / Formicidae / Fundamental and applied biological sciences. Psychology / Fungi / Fungi - growth & development / Fungi - physiology / fungus gardens / Gardens & gardening / Insect brood / Insect colonies / Insects / Klebsiella / Klebsiella - isolation & purification / Klebsiella - metabolism / leaf-cutting ants / Molecular Sequence Data / Nitrogen / Nitrogen - analysis / Nitrogen - metabolism / Nitrogen Fixation / nitrogen-fixing bacteria / Oxidation-Reduction / Panama / Pantoea - isolation & purification / Pantoea - metabolism / Phylogeny / Phytophagous insects / Plant Leaves - chemistry / Protozoa. Invertebrata / Social insects / Stable isotopes / Symbiosis / Terrestrial ecosystems / tropics / Worker insects

2009

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Symbiotic Nitrogen Fixation in the Fungus Gardens of Leaf-Cutter Ants

by Chu, Fiona S.T , Currie, Cameron R , Cleland, W. Wallace , Suen, Garret , Pinto-Tomás, Adrián A , Weimer, Paul J , Anderson, Mark A , Stevenson, David M

2009

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Symbiotic Nitrogen Fixation in the Fungus Gardens of Leaf-Cutter Ants

by Chu, Fiona S.T , Currie, Cameron R , Cleland, W. Wallace , Suen, Garret , Pinto-Tomás, Adrián A , Weimer, Paul J , Anderson, Mark A , Stevenson, David M

2009

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Journal Article

Symbiotic Nitrogen Fixation in the Fungus Gardens of Leaf-Cutter Ants

Chu, Fiona S.T,

Currie, Cameron R,

Cleland, W. Wallace,

Suen, Garret,

Pinto-Tomás, Adrián A,

Weimer, Paul J,

Anderson, Mark A,

Stevenson, David M

2009

Overview

Bacteria-mediated acquisition of atmospheric N₂ serves as a critical source of nitrogen in terrestrial ecosystems. Here we reveal that symbiotic nitrogen fixation facilitates the cultivation of specialized fungal crops by leaf-cutter ants. By using acetylene reduction and stable isotope experiments, we demonstrated that N₂ fixation occurred in the fungus gardens of eight leaf-cutter ant species and, further, that this fixed nitrogen was incorporated into ant biomass. Symbiotic N₂-fixing bacteria were consistently isolated from the fungus gardens of 80 leaf-cutter ant colonies collected in Argentina, Costa Rica, and Panama. The discovery of N₂ fixation within the leaf-cutter ant-microbe symbiosis reveals a previously unrecognized nitrogen source in neotropical ecosystems.

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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science

Subject

Acetylene - metabolism

/ Acetylene reduction

/ Animal and plant ecology

/ Animal, plant and microbial ecology

/ Animals

/ ant colonies

/ Ants